Nut-lock.



J. FAHNER. NUT-LOOK.

APPLICATION FILED MAR. 23, 1908.

Patented Feb. 16, 1909.

UNITED STATES PATENT orrion.

JAMES FAHNER, OF COLUMBUS, OHIO.

NUT-LOCK.

Specification of Letters Patent.

Patented Feb. 16, 1909.

Application filed am 2a, 1908. Serial No. 422,749.

ing loose on the latter under any conditions of use.

\Vith the above and other objects in view, as will appear as the natureof the invention is better understood, the same consists, generallystated, in a washer having a radial Cleft extending from its openingthrough its perimeter, and a pair of reversely arranged shouldersdisposed in alinement with the cleft, one portion of the washer adjacentto the cleft being deflected away from the adjacent.- shoulder toprovide one of a pair of fish plate engaging members, the other of whichis formed by the corner of the washer disposed diagonally to the cleft.

The invention further consists in the combination with a locking washersuch as defined, of a nuthaving one face provided with a pair of alinedshoulders that are oppositely inclined l'elatively to the plane of thesaid face and are adapted to interlock with the shoulders of the washer,thus to hold the nut positively against movement on the bolt.

The invention consists, further, in various novel details ofconstruction of a nut lock, as will be hereinafter fully described andclaimed.

In the accompanying drawings forming a part of this specification, andin which like characters of reference indicate corresponding parts,Figure 1 is a View in vertical transverse section through a railway railand the applied fish plates, displaying the nut lock of the presentinvention assembled with a bolt. Fig. 2 is a view in side elevation,displaying the nut lock before the nut is tightened. Fig. 3 is a similarview, taken from the same side of the device, and displaying .the nutlock after the nut has been tightened. Fig. 4 is a similar view takenfrom the opposite side of the nut to that shown in Figs. 2 and 3, anddisplaying the nut lock before the nut is tightened. Fig. 5 is a similarview, taken from the, same side of the device, and'displaying the nutlook after the nut has been tightened. Fig. 6 is a top plan view,showing the nut look as itappears when the nut is tightened. Fig. 7 is aperspective detail view of the locking washer.

Fig. 8 is a similar View of the nut.

Referring to the drawings, R designates and B the bolt, that forms oneof a, series rail assembled. As these parts may be of the usual, or anypreferred, construction,

further description is deemed unnecessary.

The novelty of the present invention resides in the peculiar form oflocking washer l which is shown in detail in Fig. 7.

This washer is approximately semi-circular, when viewed. in elevation,the flat side 1 of which is designed to bear against the base of thefish plate to hold the former against turning, when the nut 2 is beingturned to its seat- The washer is provided with a radial cleft throughits perimeter, and one face of the washer. which will be the outer oneinuse, is formed with two nut locking shoulders 4 and 5 that are arrangedin alinement with the cleft. The shoulders are formed by cutting away orbeveling the said face of the washer in opposite directions relativelyto the plane of the face, as clearly shown in Fig. 7, and the portion fthe washer is deflected away from the shoulder 5 to provide onefishplate engaging member 7 of a pair, the other one 8 being formed bythe corner of the washer diagonally opposite the cleft. The provision ofthese twomembers 7 and 8 causes the portion of the washer from thecorner 9 to the shoulder 5, and practically all of the remaining portionof the washer from the point or member 7 to the point or member 8, to beout of contact with the fish plate before the nut is tightened, as

struction of the washer-will cause the nut engaging faces 10 and 11,which, as above stated, are oppositely beveled or inclined, to impingeclosely against the oppositely inclined or beveled washer engaging faces12 and 13 of the nut, and secure an intimate union between the two thatwill preclude any rocking or movement of the washer, even when the nutis only slightly tightened. The

an ordinary railway rail, 1* the fish plates,

3 that extends from the bolt opening entirely (not shown) for holdingthe fish plates and clearly-shown in Figs. 2 and 3. This cont it)cutting away of the nut, to rovide the faces 12 and 13, forms two shouders 14 that are adapted to interlock with the shoulders 4 and 5 of thewasher, as clearly shown in Figs. 4 and 5, and thus positively securethe nut in position. As will be obvious, the washer will be made ofresilient metal, and the portion 6 will always cause it to exert anout-' Ward pressure against the nut and thus accentuate the lockingfeature.

As shown in Fig. 1 of the drawings, when the nut'2 is tightened upon thebolt, the portion 6, and in fact the entire washer, will be flattenedagainst the fish-plate, so that that face of the washer other than theface upon which the shoulder 4; is formed, will bear fiat against theouter face of the adjacent fishplate. 1

-For sake of convenience, the object against which the washer bears isdescribed as a fish plate, but it is to be understood that the positionThe combination with a bolt, of a washer having a portion of itsperimeter straight to present two corners, and provided with a radialcleft extending from its bolt \opening through its perimeter, and withone of its faces furnished with oppositely inclined sur- L faces thatdefine a pair of reversely arranged shoulders disposed in alinementjwith the cleft, one portion of the washer adjacent to the cleft beingdeflected away from the contiguous shoulder to provide one of a pair ofmembers to impinge against the object to be clamped, the other of whichis formed by the corner of the washer disposed diagonally to the cleft,and a nut having one face provided with a pair of oppositely inclinedsurfaces to coact with those of the washer and also provided with a pairof alined shoulders to in terlock with those of the washer, that'face ofthe washer disposed against the object to be clamped, being fiatthroughout its entire extent when the nut is seated. In testimony that Iclaim the foregoing as my own, I have hereto alfixed my signature in thepresence of two witnesses.

JAMES FAHNER. Witnesses E. W. CADY, C. E. Done.

